Question

What if a electron in ground state is exited by an energy of 12.5 ev

Answer 1

$\huge\mathbb\green{BONJOUR,}$

$\huge\mathfrak{Answer:}$

The He+ ion is just like a hydrogen atom with two units of charge in the nucleus. Since the hydrogenic energy levels depend upon the square of the nuclear charge, the energy of the remaining helium electron should be just 4x(-13.6 eV) = -54.4 eV as observed.

$<font color ="purple"><marquee behavior ="alternate"> ~♥~~♥~Hope It Helps~♥~~♥~</font color ="purple "></marquee behavior="alternate">$

$\huge\mathfrak{Regards}$

$\huge\mathbb\red{Aaravxxx}$